Picking-roller



.NITED STATES PATENT OFFICE,

JAMES MARSHALL, OF FALL RIVER, MASSAOHUSETTS.

PlCKlNG-ROLLER.

SPECIFICATION forming part of Letters Patent No. 510,695, dated December 12,1893.

Application filedAugust 18,1893; Serial No. 483.460- (N0 model.) i

To all whom it may concern.-

Be it known that I, JAMES MARSHALL, a citizen of the United States, residing at Fall River, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Picking-Rollers and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make apd use the same.

In the manufacture of many diflerent articles and in the preparation of fibrous material for manufacturing difierent articles, it is frequently necessary to pick over or separate or draw out from the body of fibrous material the different fibers, both for the purpose of eliminating extraneous material and for loosening or breaking up the closely packed and knotted portions, and to this end it is common to use pickers consisting of cylinders provided with pointed teeth toward which the fibrous material is fed. It has been found that in the use of-pickers of-this character it is necessary to employ feeding rolls for carrying the fibrous material, as for instance fur, wool, shoddy, &c., toward the picker roll, and that the apparatus is very apt to become inefficient after short use, because in the endeavor to set the picker teeth close to the feed-roll the ends of the same are apt to be brought into contact with the feed-roll and dulled or blunted or bent.

Inasmuch as it is desirable at all times to maintain the ends of the picker teeth as close to the face of the feed roll as possible without actual contact, I construct the picker roll as fully set forth hereinafter, and as illustrated in the accompanying drawings, in which Figure 1 is a part sectional plan View of the picker roll and one of the feed rolls of a picking machine illustrating my improvement. Fig. 2 is a transverse section of the picker roll; Fig. 3, a vertical section showing part of a picker machine provided with my improved picker roll.

The feed belt A which supports the fur, Wool, shoddy, or other fibrous material which is to be picked, is supported by and passes around two cylinders, one of which, B, is shown in Fig. 3, the said cylinderBbeing arranged adjacent to the lowermost of two feed rolls 0, 0, each of which is a plain cylinder, and the picker roll Dis arranged at the opposite side of the feed rolls, as shown. The picker other suitable material and is provided with the picker roll D is a hollow metallic cylinder, closed at both ends, and mounted upon a shaft 19.

In addition to the teeth upon the picker roll I arrange thereon two, three or more annular ribs 6, e, 6, three of such ribs being shown, one at each end and one at the center, constituting practically annular flanges, which flanges are of a depth very slightly exceeding the extent to which the teeth project from the surface of the cylinder or roller. When the picker roll is in the machine the edges of the flanges or ribs 6 bear directly upon the surface of one or other of the feed rolls, or if not in direct contact are brought as close as possible thereto, and should either of the feed rolls or picker rolls; in consequence of the wearing of the journals, warping of the frame, orcarelessness. in adjusting the bearings, change its position so as to bring the picker roll nearer to the roll or rolls, then the contact or bearing of the flange 6 upon thesur face of the feed roll will prevent the closer approach and will also prevent the contact of the ends of the teeth with the surface of the feed roll. Thus, without regard to those contingencies which are almost inevitable in this class of machinery, I am enabled to preserve the form, position and sharpness of the picker teeth, so that there is no deterioration except from the inevitable wear from the material operated upon.

The setting of a picker roll when constructed in accordance with my invention is rendered extremely easy, it being only necessary that the operator secure the rolls in such position as to allow the flanges on therolls to engage the feed roller. These flanges, as has been described, are of a greaterdepth than the picker teeth, and thus all danger of the teeth coming in contact with the feed roller to adjust the picker roll too near the feed roller. The operation of setting the rolls now roll D may be constructed of wood, metal, or

the usual radial pointed teeth a. As shown is obviated, it beinga matterof impossibility 10o in vogue is extremely diffioult and one in which the greatest care and accuracy are required.

My improvement may be used in connection with picking machines used in operating upon different materials in different arts, and it is especially adapted for use in thepicking machines employed in picking fur,ifelt, shoddy, &c.

Without limiting myself to the precise construction and arrangement of parts shown, I claim- 1. The combination with the feed rolls of a picking machine, of a picker roll provided with projecting teeth and With two or more annular ribs or flanges extending slightly beyond the points of the teeth, substantially as and for the purpose set forth.

2. A picker roll for picking machines, consisting of a cylinder having teeth projecting substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES MARSHALL.

WVitnesses:

DAVID F. SLADE, SYDNEY IT. BORDEN. 

